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"It's only when you get to that stage where you're going to persuade the average British voter that you were lied to.

"You were promised you could leave the EU and everything would stay the same. The reality is you can leave the EU, yes that's your choice, but everything will fundamentally change.

(Image: Getty Images)

"When you begin to realise that you're no longer going to have cheap holidays in Portugal or Spain or Italy, you've got to drive to Scotland or get a ferry to Ireland as your only holiday options, maybe we'll begin to rethink the whole Brexit debate.

The single market for aviation, created in the 1990s, means there are no commercial restrictions for airlines flying within the EU.

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Mr O'Leary has repeatedly warned that airlines will be forced to cancel post-Brexit services from March 2019 if no agreement is reached in the Brexit negotiations by September, because schedules are planned about six months in advance.